Ski binding



Nov. 15, 1938. s. HOLM 2,137,048

SKI BINDING Filed Oct. 8,1957

luvEmrora:

SVERRE HOLM WMMQLW Patented Nov. 15, 1938 PATENT OFFICE SKI BINDING Sverre Holm, Oslo, Norway Application October 8, 1937, Serial No. 167,890 In Norway December 10, 1935 Claims.

The present invention relates to ski bindings of the kind in which the boot may be secured to the ski without the use of a back or heel strap.

Ski bindings of this kind are known compris- 5 ing toe lugs provided with vertically moveable jaws adapted to pinch the rim of the boot sole firmly between the underside of the jaw and the foot plates of the toe lugs.

According to one known construction of this kind each side member of the toe lugs is at its upper edge provided with an inwardly projecting part having a threaded bore in which a screw is screwably mounted and adapted to press the jaw against the sole rim.

The present invention is distinguished from this known kind of ski bindings, thereby that the part of the vertical toe lug extending before the said inwardly projecting part is made higher than the level of the inwardly projecting part. The ski binding may preferably be made in such a manner that a notch is cut out in the ver tical side member of the toe lug, said notch extending downwardly from the upper edge of the side member, and adapted to receive the head of the screw. The inwardly projected part is in this case provided at the under edge of the notch.

According to this form of the invention both that part of the side member of the toe lug extending before the inwardly projecting part and the part of the side member extending backwards from the said inwardly projecting part are lengthened above the level of the inwardly projecting part.

The ski binding according to the invention comprises several other novel features which will appear from the following description with reference to the connected drawing, in which:

Figs. 1, 2 and 3 show one form of a toe lug according to the invention seen from the side, respectively in section along the line 11-11 on Fig. l, and from above with the foot plate partly broken off.

Fig. 4 shows perspectively a modified form of the ski binding, and

Fig. 5 is a sectional view along the line VV on Fig. 4.

Figs. 6 and '7 illustrate a method of making the toe lug according to the invention.

On Figs. 1-3, I designates the foot plate of the toe lug, and 2 the vertical part of the same. 3 indicates the jaw adapted to be pressed against the boot sole, by means of a screw 4, being screwably mounted in a member 5, projecting inwardly from the vertical plate of the toe lug. The screw 4 consists preferably of a A!" screw with steep threads and made of stainless steel. As will be seen from the drawing, the inwardly projecting part is situated a distance below the upper edge of the side member of the toe lug. The screw 4 is at its upper end provided with a head 6, preferably made with a knurled surface, and being received in a notch 1 being cut in the lug, said notch extending from the upper edge of the side member downwardly to the nut or part 5.

By arranging the part 5 a distance below the upper edge of the side member, and by cutting out a notch 1 above this part, it is made possible to position the upper end of the screw and its head 5 is flush with or below the upper edge of the side member. It is evident that this is a substantial advantage compared with previous constructions of similar kind.

In order to secure the screw 4 in tightened position a lock nut 9 may be provided preferably made as wing nut for easy operation with the fingers, and further one or more Washers 8.

When the lock nut is tightened, it will independently of the position of the screw take up a predetermined position relatively to the toe lug. The wings may therefore be placed in such a position on the nut, that they are in tightened position of the nut flush with the lug. The lock nut may, however, like the head 6 be made with a knurled surface, and the wings may in this case be dispensed with. i

The jaw 3 is preferably composed of two parts, namely the lower part II) being on its underside made curved, and an upper part II being fastened to the part I!) by riveting or in another suitable way. The screw 4 is at its lower end provided with a head I! situated on the underside of the part I I and received in a cavity in the part It]. Hereby is secured that the screw 4 may be turned in relation to the jaw, taking at the same time the jaw with it in its vertical movement.

In order to make space for the inwardly projecting part 5, the side member of the toe lug may preferably be bent outwardly at its middle part, as shown at I3 on Fig. 3, and the jaw may be correspondingly formed as shown at l4. For guiding the jaw, two vertical ribs l5 may be provided, corresponding to and cooperating with notches in the jaw.

The ribs and the notches are preferably formed such that the ribs have increasing sections in direction from the toe lug, being tightly enclosed by the notches in the jaw. Hereby the ribs hold the jaw close up to the side member of the toe lug. In order to further prevent a too strong rocking of the jaw when pushing the boot into the binding, stops 20 and 2| are preferably provided, and further an auxiliary screw 22 being 5 screwably mounted in a threaded bore in the part 5 behind the screw 6. The screw 22 may be secured in desired position by means of a lock nut 23.

The stops are preferably provided in the outwardly bent part 30 of the lug, so that they do not engage with the boot. The front part l6 of the side member of the toe lug is preferably made a little higher than the back part H, and the toe lug is at its front edge bent inwardly at l8, whereby accumulation of snow between the toe lug and the boot is prevented.

The inwardly projecting part 5 may either be made by welding a suitably made block or nut on the inside of the-lug, or as shown on the drawing by folding and bending inwardly a lap I9 being cut out in the lug, and corresponding to the notch 1. On the underside of the jaw a piece of leather or the like may be fixed, if desired, in order to prevent or reduce wear of the boot sole.

The modification of the toe lug according to the invention shown on Figs. 4 and 5 differs from the form shown on Figs. 1-3 substantially thereby that the lower part 23 of the toe lug is made plane, while the middle part 25 extending beyond the dotted line 24 being bent outwardly in the same way as shown on the form on Figs. 1-3. The connection between the screw 4 and the jaw is also made in a some different way.

The jaw is in a way corresponding to Fig. 2 composed of two parts 26 and 21. In the upper plate 21 a slot 28 is formed, in which the lower part of the screw 4 may be passed.

A lug according to the invention may be made in different ways. One may use a plane, substantially rectangular plate blank, which is bent in right angle about a right line, for making the foot plate and the vertical side member of the toe lug. The outwardly bent part of the side member may in this case be made by a following pressing operation.

Another method of making the toe lug according to the invention is illustrated on Figs. 6 and '7. A plate blank of substantial T-form is here used, having a narrower part 29 and a broader part 30. The part 30 is at first bent along the dotted lines 3| and 32 according to the desired ground plane of the vertical part of the toe lug, whereafter the part 29 is bent in right angle in relation to the part 30 about the dotted line 3|.

- The toe lug gets hereby in ground plane the shape shown on Fig. '7.

I claim:

1. Ski binding adapted to engage upon the rim of the sole of a boot, comprising toe lugs having vertical side members, the middle part of each side member being outwardly curved, whereas the forward and rearward part of each side member have a plane inner surface, each side member being provided with an inwardly projecting portion having a vertical threaded bore, a screw operable in each of said bores, a jaw cooperatively associated with each side member and mounted to be movable in a vertical plane and adapted to be pressed against the upper surface of the rim of the sole by means of said screws.

2. Ski binding adapted to engage upon the rim of the sole of a boot, comprising toe lugs having vertical side members, the lower part of each side member having a plane inner surface whereas the middle portion of the side members above the said lower part is outwardly curved, each side member being provided with an inwardly projecting portion having a vertical threaded bore, a screw operable in each of said bores, and a jaw element operatively associated with each side member and mounted to be movable in a vertical plane and adapted to be pressed against the upper surface of the rim of the sole by means of said screws.

3. Ski binding adapted to engage upon the rim of the sole of a boot, comprising toe lugs having vertical side members, the front edge portion of each side member being bent inwardly in order to prevent accumulation of snow between the toe lugs and the boot, each side member being provided with an inwardly projecting member having a vertically threaded bore, a screw operable in each of said bores, and a jaw element cooperatively associated with each side member and mounted to be moved in a vertical plane and adapted to be pressed against the upper surface of the rim of the sole by means of said screws.

4. Ski binding comprising toe lugs having vertical side members, each side member provided with an inwardly projecting portion having a vertically threaded bore, a screw operable in each bore, a jaw element cooperatively associated with each side member and adapted to be moved in a vertical plane and be pressed against the upper surface of the rim of the sole by means of said screws, and a pair of vertical ribs projecting from the inner surface of each side member and adapted to guide the movement of the jaw elements, said jaw elements having notches corresponding to and cooperating with said ribs.

5. Ski binding according to claim 4 in which the ribs have dove-tailed connection with the jaw elements.

SVERRE HOLM. 

